Windows 10: Best Windows for Intel i5-9400 processor?

I'm planning to upgrade my PC to Windows 11 from Windows 10 by clean install. My question is, what OS is more optimize and more stable to Apps and Games? If i upgrade to windows 11 will i experience lag and crash issue compared to windows 10? Pc specifications:Intel i5-9400Intel UHD 6301x 8GB DDR4 2666Mhz240 SSD

:)

 

Asus Z390 Maximus XI Motherboards

List of Intel's new 9th Generation R0 Stepping Processors:
Intel Core i9-9900KF
Intel Core i9-9900K
Intel Core i9-9900
Intel Core i9-9900T
Intel Core i7-9700K
Intel Core i7-9700F
Intel Core i7-9700
Intel Core i7-9700T
Intel Core i5-9600KF
Intel Core i5-9600K
Intel Core i5-9400F
Intel Core i5-9400
Intel Core i5-9400T

 

Though my processor is Intel Core i5 7200U @2.5 GHz is listed for Win 11 but not supported

You are looking list for Win 10 supported CPU's. Here is list for Win 11 supported CPU's where i5-7200U isn't listed.

Windows processor requirements Windows 11 supported Intel processors | Microsoft Docs

 

Intel Gives Core i3 and Core i5 Dual-Core Processors K0 Stepping Update

Intel is giving some existing 32 nm "Clarkdale" based Core i3 and Core i5 processors an update. The processors will transition to the new K0 stepping from the existing C2 stepping. The parts that will be made on the K0 silicon are Core i3 models 530 (new sSPEC: SLBX7), 540 (new sSPEC: SLBTD) and Core i5 models 650 (new sSPEC: SLBTJ), 660/661 (SLBTK/SLBTB), 670 (SLBTL). Newer and upcoming models such as the i3-550, i3-560, i5-665K, and i5-680 are already being built on the K0 stepping die. Motherboards will require a BIOS update to support the new K0 stepping processors.

The K0 stepping change includes the following highlights:

• New S-spec and MM numbers for the converting products
• Extended CPUID will change from 0x00020652 to 0x00020655
• Host RevID will change from 0x12 to 0x18
• K0 stepping package is pin compatible with C2 stepping package
• Adds Processor Context ID (PCID) support

The revised older SKUs that are built on K0 stepping will be market-available by October 16.