Version of Bluefire closest to Tenergy 05

It is Bluefire M2. 

M2 hits better IMHO, spin is similar on most shots, opens as well off of backspin, throw is a little lower, M2 flattens out on harder shots, less arc.  I like pushing better with M2, and less bouncy short game.  I have only tried M3 for a few minutes, my general impression was that it favors T80 more then T05, could be misleading since I don't have any extensive playing time with M3.

T05 gives easier spin on most shots, has a slightly higher throw, loop is the main shot here.

Price aside, my level hasn't changed with the change in rubber, but I'm more comfortable for general allaround play with M2.  

Different overseas retailers have different approaches to making a profit.  Where other major retailers like TT11 over slight discounts up front but extended discounts with bulk purchases as well as free shipping, I suspect TTNPP offers steep discounts up front, but recoups some of their margins through their shipping fees (they charge more to ship with HK post than some taobao agents for the same goods). 

But even still their profits are slimmer in the end because megaspin's price includes the convenience of a domestic/quick delivery and a high level of customer service, and in order to compete TTNPP needs to advertises prices low enough to be worth the extra week(s) it takes for delivery compared to domestic retailers should consumers shop with them.

The minimum advertised prices for dealers can also differ depending on region/continent and their distributors' discretion, which was why BTY disallowed their retailers from exporting overseas because one recent example was because BTY North America's sales were being crippled by shops like tt-japan and iruiru in Japan offering Tenergy and other goods almost 27% below their MAP in NA.  This is also probably why they distribute directly to their dealers in every region instead of appointing distributors, but not all brands employ the same model (ex. Donic) so some dealers can get away with selling at lower prices.

I recently tried M2 max again after a long bout with T05. I think they are quite a bit different in usage: