Nexus ptt2000 and Nexus U94 ptt same?

[GrahamS]

I need to get a PTT for my RS MSA Sordin headset the spec states that it needs either a Nexus ptt2000 or a ptt7000
However the Nexus U94 ptt looks to be the same as the ptt2000 are they the same or will it not work with it?

The headset is an MSA Sordin CC Supreme Pro IV Mil Spec Waterproof DYNAMIC Mic
and it's linking to a Motorola XTNID