HELP, what makes this difference in power

97-98 126hp @ 5400 rpm
133 ft-lbs (18.4 Kg-M) @ 4300
8.8:1 CR

99-00 146hp @ 6200 rpm
133 ft-lbs (18.4 Kg-M) @ 4500
9.6:1 CR

this is the b20 crv engine, hows the 99-00 better, like i know its more powerful, what makes it that way? head gasket? the head?

Higher CR, last time I checked the difference between B’s and Z’s are the pistons themselves, the rods & crank and block are the same.

so the JDMB20b is the same specsas the usdm b20z right?

Correct!

The intake manifolds are radically different as well.