Radio Advancement:
Advancing your frame via radio is easy, as long as your target frame is relatively low. You dont want to have tap the lower-right station 1000+ to reach your frame.
A Bad thing about advancing by radio is that
1. When Buena Password is on, you cant advance the frame via password
2. Each tap is only advance the frame by 1+
Difference with SS and radio taps
For low frame, and if you need precision, radio the way to go.
If you need to reach high frame, advancement the frame via SS is the way to go, when you close to your frame you can also your radio taps
Yes its very possible, rng pokemon with the delays of 592-602 for Platinum and 625-628 Diamond