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
Hello,
I would get the matching older sub for right now. Everyone says get two matching subs. If you buy the matching sub to your current sub you will have a pair. This should make them both more valuable. I have a pair of the T9’s. I love them. The i or x models are front firing and the older version like mine are down firing with a passive front woofer. I agree if you are buying new subs get the S series for music. I use a home theater pass through on my system. I like that the Rel subs have Speakon and RCA for music and LFE RCA for the movies all separately adjustable. They go down to 28hz so I might add a KEF KF92 sub just for the theater side to go down to 11hz. We will see. Grab the matching sub to yours for now. Wait for a deal on the new REL stuff. 
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🇦🇺