You can use the telescopic MP. Its inner tube is thinner, similar to the iAtty's. I keep mine short as possible for better flavor, & heat. I remember when I got my Ody the improved air flow, there was so much air. I don't think the iAtty has the air flow the Ody & Ithaka have, adjusting the air draw ring to mimic the iAtty's air flow might have the impact your interested in getting.
I didn't upgrade from v1 to v2 because I couldn't justify the expense. When the Ithaka came out and I checked its ceramic & holder for fit in the Ody, it fits perfectly. I upgraded all my Odys to dual coils. The 2 I use most often sport telescopic MP's.
The way I see it the Ithaka had so many changes, but not all of them were right for me, but several were.
I liked these changes, dual coils, large & small caps.
I did not care about these changes, adjustable center pin ( to long, Odys is much shorter), basic feed ( not needed with the dual coils, dual channel feed), ground side nut (Odys is positive side & much better for me)
So I combined the two together, incorporating the parts I like. I haven't used my Ithaka since. This Ody sports all the functions I like from both GG atomizers.