At the risk of sounding flippant, the one that you most enjoy using and best serves your needs.Which is the better radio scanner ??
Is not the Whistler the same as pro 106 ?
The Pro-18 is similar, but not the same as the PSR-800. The 18 has less memory, and doesn't do Phase II like the 800. I, also, believe, that the 18 doesn't have the discriminator output from the headphone as does the 800.GRE PSR-900 = old RS PRO-xxx = new RS PRO-??? = Whistler WS-1095
GRE PSR-800 = old RS PRO-18 = new RS PRO-??? = Whistler WS-1080
GRE PSR-600 = old RS PRO-197 = new RS PRO-652 = Whistler WS-1065
GRE PSR-500 = old RS PRO-106 = new RS PRO-651 = Whistler WS-1040
GRE PSR-200 = old RS PRO-405 = new RS PRO-650 = Whistler WS-1025
GRE PSR-100 = old RS PRO-404 = new RS PRO-649 = Whistler WS-1010