What is CWT never heard of them before.
How do you trust an online tier listing when you haven't even heard of the OEM's? :|
Anyway while I'm on it I just want to add, don't simply trust a popular opinion especially on PSU's/Audio products even if it's reviewed or rated by a well-known guy/site. You don't know if the said person/site works for a company which manufactures those products (FYI, JonnyGuru worked for Corsair last I remembered). Read reviews, just don't blindly trust them. Especially PSU tier listing. There is also something called "fan-brigading", this is very prominent in international tech forums. Very very popular thing. Reddit is a classic example of this.
If I were to make my own tier I would put the Seasonic M12II in Tier 1.5 and the TX-M in tier 2 and get whichever is cheaper. Just my own opinion of course, like everyone else who made those tiers.
Also it seems that Corsair introduced new TX-M PSU's with more warranty. If we are talking about warranty even Cooler Master new Master PSU's (not all though) comes with 5 years warranty when other PSU's in the same price range have only 2-3 years of warranty. And CM is well known for making crappy lower-entry PSU's. Their new Master series are not any different. If I really want a CM PSU I would go for the V-series (if they are still available).
So in the end, for me, reliability is more important than warranty and 5 years is good enough for me. Besides, the Seasonic M12II is also fully-modular while the TX-M is semi-modular. The Bronze, Gold and Platinum efficiency is important yes but it doesn't affect me as much.
I do fully agree on the pricing. It seems that Tirupati, knowing how good and popular the Seasonic PSU's are, are trying to make the maximum profit out of that.
Hope that clears up my choice on the PSU's.
PS: please don't take the distributors words to heart. I've personally met some of the big guys in the Indian market and they always say some shit or others against their competition. One time I even had to debate and later personally debunk their claims in their head-office. It was a very weird experience.