Re: SHPR-1 bridge vs SHPR-2 Bridge..
The higher output SHPR-2 is very noticeably thicker tone and higher output, due to the high output windings and the A8 magnets. I had to do a lot of magnet swapping to end up with a useable set of tones in an LP. In your (presumably) brighter Strat you may be ok with it as is, but I suspect that you'd benefit also from some mag swaps. Output wise, it may play very well with your other pups, with or without the stock A8's.
The SHPR-1 would probably be good as-is, or maybe with one A8 swapped in. The rail will probably sound a bit weak compaired to your other pups without the A8 mod.