How Do I Choose Between A Rotary And Hover Lawwn Mower?

Hover mowers are usually rotary ! I think you mean cylinder or rotary. Depends if you want “stripes” or not. If you want stripes you need a cylinder mower, quite expensive compared to hover. If you just want to cut the grass go for a hover, if you have lots of grass, go for a rotary petrol, ie Mountfield. Petrol engines go for Briggs and Stratton for preference.