stage 1 cams vs stage 2 cams

looking to get some crower cams and had a few questions

is there a huge difference in the performance of stage 1 vs stage 2

i know stage 2 requires valve spring upgrade

also if i decided to go with the crower stage 2, do i have to get their valve springs because they're like $450


also is looks to me as if there are two stage 2 cams from crower

here is the info on one of them

63402A-2 Stage 2 - Stock idle lobes w/63402-2 VTEC lobes.
Requires #84161 spring/retainer kit.
RPM range idle to 9000+.
Int- 311 mid
Exh-308 mid Int- 255 mid
Exh-248 mid Int- 466 mid
Exh-466 mid






here is info on the second

63402-2
Stage 2 - Road/Rally & Street/Strip.
Most popular for all-motor applications.
Requires #84161 spring/retainer kit.
VTEC controller recommended.
RPM range 1000-9500+.
18-21 hp
Int- 311 mid
Exh-308 mid Int- 255 mid
Exh-248 mid Int- 466 mid
Exh-466 mid

is the difference that the first one just retains stock idle and makes less power, why is it a stage 2?

if you get any stage or or higher cams, you must get the spring/retainer kit if you do not want to sacrifice any valves or valve springs breaking off causing more damage to ur motor than you paid to get the cams the kit is worth the money to save any future and more disastrous just do research on it and ask a bunch of professionals at a bunch of different companies. building a motor is all about ur research and patience its all worth.

my bad on that last post i meant to say if you get any stage 2 or higher cams ha sorry