I have the f1 with the long cord and readout box (display) sitting on my shooting bench. I also purchased the optional switch which plugs into the box and is extremely helpful at switching through the numbers to make sure you didn't write one speed down wrong. I had the wiring figured out to make my own pushbutton switch, however, when I saw how involved all the soldering would be, putting the jacks on and getting a cord with plug at each end, I ended up buying it pre-made and when I got it and saw how well it was made, I never thought a thing more about the extra money spent!
I think the Beta one had the printer which I absolutely did not need, just one more thing to possibly break.
If it is the one with printer, if you really don't need the printer, I would seriously consider saving some money and getting the f1. Along with the switch I also purchased an extra set of rods and shades, just in case I shoot one. I don't think I ever will, however perhaps I could be a good Samaritan to someone at the range if THEY happen to have the f1 and they happen to destroy a rod or portion of shade.