Garmin GTX335 vs GTX330ES

Members,

I am looking at ADSB OUT capability.
I already have GTN650 and digital encoder.

I'm not seeing much difference between the 335 and 330ES - is there anything I missed?

Do either of these units need a speed taxi/air sensor like some of the other manufacturers transponders require?

Price the 335 is less expensive, then the 330ES.

The GTX 335 is smaller in depth 10.07" deep vs 11.25" for the 330. In some RV's that matters.

The 335 allows the use of a rear mounted pressure altitude encoder.

I replaced my Garmin GTX 327 in my RV-8 with the GTX 345.