Question for Oticon Experts

I switched from Phonak to Oticon when I got a chance to buy some original Opn and I have been very pleased with them. These are tech level “2”
Since these are quite old, I am looking to upgrade. I really want to stay with 312 batteries so this limits me to the OpnS. Given the choice, would you think this is a significant upgrade or would I notice more benefit by upgrading to the higher tech level of “1”. (ie Opn1 or OpnS1)
I don’t do meetings or noisy restaurants so any improvement in noise management would be superfluous.

I think Oticon Real is available in 312 according to this page.

WH

Oticon has released updated 312-battery operated devices a few times since the Opn (Opn S → More → Real), with the jump from Opn S to More being the most dramatic chip-wise. The Opn S line is solid, but for technology that old I would see if you could go a little newer.

At least in recent years I find Oticon to do quite well with making their level 2 devices very comparable to their level 1 devices. In general, I may prefer a level 1 of a previous generation to a level 2 of a current generation, largely due to the features that tend to stay the same from generation to generation e.g. number of frequency bands.

Many thanks @PaulC and @WhiteHat. I see that in the More and Intent lines the disposable battery models have t-coils and they are the same size and shape as the rechargeable ones. I really like the “thinness” of the Opn with 312 battery as it gives more room behind my ears for my glasses.
In view of your comments, I think I will look out for either Opn1 or OpnS1.
Thanks

The More & Real are about the same size as the OPN.
The Intent is shorter, but a bit thicker than the former.