Cam choice for low compression motorhome 440

For the sake of comparison, how does the Comp Cams Thumpr fair against the Hughes Whiplash? Being in Canada, a fair amount of money can be saved by buying from our local speed shop who is a Comp vendor. (Exchange on dollar adds big expense). My friend is a retiree and so when recommending cams I must be mindful of cost. To me these cams appear similar with slightly less duration and lift on the Comp piece. Could this be run with power brakes in a 440? Thanks again everyone for the help, sharing your experience is appreciated.
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