are there any downsides to the Sanwa integrated antenna?

[Monkeysmate]

I'm looking for another sanwa RX, and i'm thoroughly confused by the sanwa offerings...

i'm not clear why i'd buy one over the other (accepting that i need it to run FH-4 modulation).

In particular, i've no idea why i might want the RX-472 which has a conventional antenna, or the RX-482 which has the integral antenna.

Are there any downsides of the integral antenna?

Thank you