I don't know about SDCC Blaster, but I'm really happy with my TFC Blaster. It's just as good as my original G1 Blaster was when I got that minty knew in Xmas of '85. The vermillion on TFC Blaster looks a bit darker/reddish than G1 -- but it could be because my G1 Blaster's a bit faded after 20* years. The chest-door mechanism on the reissue also works really well, whereas my G1's jams easily (and has done so since early on).

And unlike some other reissues, there's no discernable difference between G1 and TFC Blaster... they're virtually identical. The only difference is probably just the copyright stampage (and possibly shade of vermillion if my G1 isn't that faded ). But I'm as pleased as peach w/ TFC Blaster and I highly recommend this toy.

If SDCC Blaster is as good as TFC Blaster then that won't disappoint either. But I personally can't comment as I don't own SDCC Blaster nor have ever seen him for myself IRL.

---------------------------------------
*Before anyone jumps on my math, I got TFC Blaster in 2005, so it was 20 years since I got G1 Blaster! It got it in December too IIRC, which was the same month that I got G1 Blaster (since he was an Xmas pressie). Wow... never thought of that before. Cool!