Theres no real difference, tiger drive, rotostart, drill start they all do the same thing but might use different shafts.
The spring mechanism and string is done away with. The other main moaning point on pull/shaft starters is the one way bearing. This still remains a problem with these starting mechanisms. To make your pull start last you just need to get everything right to get the engine started in 1-3 pulls. Thats a good charge on your starter and fuel in the carb, and you should be ok.
Works for me anyway