The model-B & deluxe are both staple machines in my shop. Neither is stock as I have made immense mods. I had the porper first & it has been involved in every cue I have ever built. Each machine has it's unique strengths and weaknesses.
The porper is solid & sound & has variable speed, which is handy for several things. The tailstock is solid for accurate joint work, but it's non-adjustable so you get what you got. The chuck can be tuned to run within .0005" runout & is equivelant to a machine lathe in repeatability, very good chuck.
The deluxe has two chucks mounted a few inches apart that make working with individual components a breeze. It has a locking carriage, also with adjustments so it can be tuned for extreme accuracy. The tailstock is adjustable but not quite as sturdy as the porper. It has a very nice bearing rest that utilizes collets for high accuracy. If you make tapered ID collets with the ID to match your work, then you can get great accuracy. Last but not least is the taper bar system, especially if it's your only machine. The shaft bar is infinitely adjustable & the spring pressure keeps the carriage securely pressed to it. It's a simple but wonderful tapering system.
Overall, i'd start with the deluxe first if I had it to do over again. I still use mine for facing parts & other critical jobs. The porper would be bar-none best, ultimate cuemaking lathe if it had a few mods in design. But as is, both machines will build a very nice cue and are easy to use.