I’ve had the rapid and a few BSA PCPs Including the super10 which is what the previous model before the R10.
.The R10 costs less than the rapid.
.The R10 has quick fill and a pressure gage the rapid doesn’t.
.I think the rapid mag system is better and more reliable than the BSA one.
.The rapid is available in .20 cal
.The BSA has a shrouded barrel and may need an added silencer, were as the rapid has a vortex silencer as standard.
The early R10 models had some problems which had to be sorted buy BSA were as rapids are bombproof.
Good luck with your choice.