A point that most people ignore is that the dive computer algorithm only sets the profile of the dive if you are diving to the limits of the model and it is indicating mandatory decompression stops. If you are diving within the limits of both models, then the which model you are using is not relevant.
IMO, it is best for you to set your own proper ascent profile, with the computer being used to give you a general indication of your overall loading.
Were I to be doing a dive with significant decompression where I was going to be following the series of decompression stops calculated by the computer (dive computer or topside PC), then I'd use the RGBM or VPM algorithm. In that sort of dive with significant mandatory decompression, with the stops being set by the algorithm, then the choice of algorithm is important.
In practice, my dives and those of most recreational divers are within the no-stop decompression limits and the computer gives little or no guidance as to the optimal ascent and stops to make if one wishes to add additional margin beyond the model limits. I simply use the N2 bargraph of an ancient Oceanic hocky puck computer to confirm my rough estimate of how heavily loaded I am, and therefore whether my ascent is going to be a short 3 minute one, or whether I'll be doing my more typical 6 to 12 minute ascent and stops.
Charlie Allen