iQOO Z9s vs vivo Y400 – Price, Specs & Features

Q: Which phone has better performance, the iQOO Z9s or the vivo Y400?

In this performance comparison, the iQOO Z9s with its Dimensity 7300 (4nm) performs better than the vivo Y400 with the Snapdragon 4 Gen 2 (4nm), thanks to superior chipset efficiency.

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iQOO Z9s

Dimensity 7300
4 nm
5500 mAh
44W
6.77"
1080x2392 pixels
50 MP
4K@30/60fps
Specs

vivo Y400

Snapdragon 4 Gen 2
4 nm
6000 mAh
90W
6.67"
1080 x 2400 pixels
50 MP
1080p@30fps
Specs

vivo Y400

General

Launch Date

August 21, 2024

August 04, 2025

Availability

Available Now

Android 14

Android 15

Custom UI

Funtouch 14

Funtouch 15

OS Updates

2 Years

Security Updates

3 Years

AI Features

AI Image Studio, AI Erase 2.0, AI Transcript Assist, AI Note Assist, AI Documents, Circle to Search, Focus Mode, Screen Translation and more

Body

Dimensions

163.7 x 75 x 7.5 mm

162.3 x 75.3 x 7.9 mm

Thickness

7.5 mm

7.9 mm

Weight

180 g

197 g

Build Details

Plastic Back, Plastic Frame

IP Rating

IP64 (dust and water resistant)

IP69 (dust tight and water resistant (high pressure water jets; immersible up to 2m for 30 min), MIL-STD-810H compliant*, also IP68 rated)

Display

Size

6.77 inches

6.67 inches

Type

AMOLED, HDR10

AMOLED

Refresh Rate

120 Hz

Peak Brightness

1800 nits

Resolution

1080x2392 pixels

1080 x 2400 pixels

Pixel Density

388 ppi

395 ppi

Aspect Ratio

20:9

Screen to Body Ratio

90.3 %

87.9 %

Performance

Chipset¹

Mediatek Dimensity 7300

Qualcomm Snapdragon 4 Gen 2

Process Size

4 nm

CPU

Octa-core
4x2.5 GHz Cortex-A78
4x2.0 GHz Cortex-A55

Octa-core
2x2.2 GHz Cortex-A78
6x1.95 GHz Cortex-A55

GPU

Mali-G615 MC2

Adreno 613

RAM & Storage

8GB 128GB (UFS 2.2)
8GB 256GB (UFS 2.2)
12GB 256GB (UFS 2.2)

8GB 128GB (UFS 3.1)
8GB 256GB (UFS 3.1)

RAM Type

LPDDR4X

Expandable Memory

Yes

Camera

Main Camera

50 MP
f/1.8, (wide), 1/1.95", 0.8µm, PDAF, OIS

2 MP
f/2.4, (depth)

50 MP
f/1.8, (wide), 1/1.95", 0.8µm, PDAF

2 MP
f/2.4, (depth)

OIS

Yes

Features

LED flash, panorama, HDR, Digital Zoom, Auto Flash, Face detection, Touch to focus

Ring-LED flash, panorama, HDR

Video Recording

4K@30/60fps
1080p

1080p@30fps

Video Recording Features

gyro-EIS, OIS

Selfie Camera

16 MP
f/2.5, (wide), 1/3.0", 1.0µm

32 MP
f/2.45, (wide), 1/3.1", 0.7µm

Selfie Video Recording

1080p@30fps

Connectivity

SIM

Dual SIM, GSM+GSM
SIM1: Nano, SIM2: Nano

Dual SIM
SIM1: Nano, SIM2: Nano (Hybrid)

SIM 1

8 5G Bands

FDD: N1, N3, N5, N8, N28
TDD: N40, N77, N78

SIM 2

8 5G Bands

FDD: N1, N3, N5, N8, N28
TDD: N40, N77, N78

VoLTE

Yes

Wi-Fi

Wi-Fi 6

Wi-Fi 5

Wi-Fi Details

802.11 a/b/g/n/ac/ax 5GHz 6GHz

802.11 a/b/g/n/ac 5GHz

Wi-Fi Features

Mobile Hotspot

USB

USB Type-C 2.0, OTG

Bluetooth

5.4

5.0

NFC

GPS

Yes with A-GPS, Glonass

Yes with Glonass

Infrared

Yes

UWB (Ultra Wideband)

Battery

Capacity

5500 mAh

6000 mAh

Type

Li-ion

Li-Ion

Removable

Wired charging

44W

90W

Charging Speed

50% in 30 min

50% in 20 min

Wireless Charging

Reverse Wireless Charging

Charger in the Box

Yes

Sound

Stereo Speakers

Yes

3.5mm Headphone Jack

FM Radio

Yes

Extra Features

Sensors

Fingerprint (under display, optical), accelerometer, gyro, proximity, compass

Under-display optical fingerprint sensor, accelerometer, gyroscope, proximity, compass

Colors and Pricing

Colors

Titanium Matte, Onyx Green

Glam White, Olive Green

Price in India

₹18999

₹21999

FAQs

Which phone has better performance?

In this performance comparison, the iQOO Z9s with its Mediatek Dimensity 7300 (4nm) performs better than the vivo Y400 with the Qualcomm Snapdragon 4 Gen 2 (4nm), thanks to superior chipset efficiency.

Which phone offers longer software support?

Both iQOO Z9s and vivo Y400 offer the same software support — 2 years of OS updates and 3 years of security updates.

Which phone has a better display?

Both iQOO Z9s and vivo Y400 feature AMOLED displays, offering vibrant colors and deeper blacks. Both smartphones offer the same 120 Hz refresh rate. Both devices deliver the same brightness level at 1800 nits. Both phones have the same screen resolution.

Which phone has a bigger battery and faster charging?

vivo Y400 features a larger 6000 mAh battery, potentially delivering better battery life. vivo Y400 also supports faster wired charging at 90W, compared to 44W on iQOO Z9s.

Which phone has better water and dust resistance?

vivo Y400 offers better protection against water and dust with an IP69 rating.

Can I buy these phones on Amazon?

iQOO Z9s – Check price here
vivo Y400 – Check price here

¹ Scores can vary even with the same chipset due to RAM, thermals, and software optimization.