The Sony is linear tracking and can be wall mounted or play standing upright, the Dual version of the Soundburger is supposed to be the best of the clamshell players. The Sony PS-F9 has a FM transmitter built in.
All of the clamshell types have ordinary carts which is the biggest limiting factor with the sound quality output.
The Sony's look nicer and seem to command higher $$
If you want a portable TT look at the Vestax handytrax, a lot bigger footprint but a nice portable TT. I have a Numark PT-01 and twin singer (soundburger type with cassette) the Numark is better than the twin singer