The VE2100 is 10 CFM of free air flow on 220/50, the 2TW-1E was 2 CFM on 220/50. Yes, both will pull a tank to 30"hg. How long it will take from 20"hg to 30"hg verses the size of tank that would match the job well, is where the trouble can start. I could not find a chart that shows either pumps performance curve in that regard.
The problems I have seen with this style of pump is that the oil traps contaminates which if not changed regularly can kill the pump. That includes tank rust, moisture and wood particles. I've tried filters, but when they get clogged, the vacuum flow is restricted. Too much trouble compared to the oiless pumps in my experience.
The larger oiless rotary vane pump itself without a motor would cost about as much as these oil filled pumps that come with a motor. Spare motors may not be as easy to come by in your area?
Your circumstance may direct you to buy what is available without the addition work of coupling the motor to the pump. Either way, get the largest free air flow as price and availability you can afford and see how it performs for your immediate needs.
DC