The 130 is noticeably softer in the lower frequencies, not nearly as focused as the 140 on the bottom. It’s even more apparent in a ported reflex cab, and exponentially more obvious as the wattage increases.
Not that it sounds "bad", just..."flabby" by comparison.
Also, I’ve personally never seen a 130 in a stock production tube Portaflex. I’ve seen Altec, Jensen, CTS, but never a D130.
I’ve heard tales of a 2 X D140 transistor model, but I've never seen that either.
That doesn’t mean they didn’t exist, just that I’ve never seen one.
I would however make a serious effort to add a factory one to my stable if you have happen to know where to find it!