With the manual oiler you pull the plunger once every 4 hours of operation. So it's price vs convenience. For hobby use the auto is total unnecessary.
Power drawbar vs manual drawbar is also about convenience. For hobby use it's also unnecessary, but if you have the cash!!! You have to also figure the noise of the compressor into the convenience equation.
TTS vs R8 shank. TTS is more convenient and you need to buy tooling anyway so you may as well take advantage of the TTS.