Apple watch se 3 vs s11, best buy?

Hi bro

How are you? Hope you are good

Plan to buy a apple watch [ SE3 Vs S11]. My usage is fitness(Home workout) , step tracking, fewer notification from selected apps(calls & msgs).

My doubt is - SE3 kum S11 kum O2 and ECG sensor tha difference except all are same,. right bro ?
Ipo fitness tracking la S11 & SE3 difference irukum ah like step count accuracy s11 la athigamah irukum due to price , step count accuracy se3 la kamiya irukum due to price and performance differ aagum ah rendu watch kum or same ah irukum ahh . Please clear my doubt. Heading to buy in upcoming month

Or I Should wait for SE4 ?

Thanks..!

hello bro, fitness tracking la difference irukaathunga. sensors are same. so se 3 sufficient for most users bro. so O2 and ECG important illati SE 3 polaamnga. should be good.