Older vs. newer REL subs


Looking for any reports about older vs. newer REL subs.

I have a REL 328 (ca. 2013) which I bought used. It's a good sub.

https://www.hifiplus.com/articles/rel-r-328-subwoofer/

I would like to upgrade to stereo subs and I've found (finally) another REL 328 which would match mine. But, before I drop coin on that, I'm wondering if anyone has had experience comparing their older REL with a newer one. What's changed? What's better, worse, or the same? I'm considering the T7x and T9x lines.

Hoping for apples to apples comparisons, vis a vis driver size, type of sub (e.g. level of product line, sealed vs. ported, music vs. HT etc.) but whatever old vs. newer comparison you have much appreciated. 

Thanks.
128x128hilde45
A matching pair of the newer version REL T/9X, one per channel, would be plenty with your 2-way/6.5" Salk monitor speakers and 60wpc tube amps. Also prefer the forward firing woofer w/bottom firing passive design of the 9x.
https://rel.net/blog/2019-10-16/principles-of-sound/old-vs-new/

trust folks who care about this subject has seen this ^^^^

of course the answer is predictable, coming from rel marketers :)

grist for the mill, so to speak

i myself cannot be more happy with my two pair of older q150e’s and storm iii’s when needed, to augment proacs quad esl’s spendors
@hilde45 I wasn’t trying to put my spin on the S series and T series uses. When I bought mine from the REL distributor here in Aus, I asked the same question and got the answer I put to you. It would seem that I was misled. So apologies to you, all commentators and to REL.
I still like my S/3s I bought 8 years ago.

AG🇦🇺
I should not have stated “current” in the models as they have obviously changed since I bought my pair. 

It goes to show, if you are going to comment, get it right or there will be an army ready to shoot you down, and not in a nice way either….