Had both for quite a while, well over 10 years if memory serves me well. BSA R-10 has been flawless. HW100 had to be returned under warranty due to low power (reg problem), also has been resealed twice and the reg stripped and reset. Fortunately by the time I had to reseal it I had learned enough from airgun blog sites and tube videos to be able to fix it myself. Definitely the R-10 if I had to choose between the two