Welcome to the forum. I look forward to your insights on melodica playing. Perhaps we will get to hear a recording or two of the music you play in Austria.
By the way, I recently purchased a Suzuki A-34C to compliment my M-32C. I like the A-34C a lot. Then again, I like the M-32C a lot too. To me, the A-34C is slightly smoother in its tone. It could be my imagination, but if you hold a key down on the A-34C and honk a note using your breath, the note seems to sustain a few milliseconds longer than on the M-32C. I can’t say for sure, but that is what I heard in a quick comparison. Maybe the “rubber” bladder in the A-34C has something to do with this. Maybe I am all wet. I will provide more definitive information and a review of the A-34C after I play it more. I was on vacation the last two weeks so I did not get to play it much.
I agree with Alan, tonal range may be one of the most important factors in the decision. The two melodions are very similar otherwise.