Do 45 rpm 12" LPs really sound better than 33 rpm?

@edgewear  You posted what you did seconds after my post, which i think addresses why MM did what they did. I don't think MM went back to 33 to reduce cost, but I do think they did this to allow for more people to buy the titles ( not everyone can playback at 45) and because the original LP's were all done at 33. With their new cable loom, it would be interesting to see and hear what the same album would sound like at 45. I suspect it would be even better than their original release. Problem is that they apparently have ceased all releases at this time. BTW, owning several of the original Deep Groove RVG Blue Note pressings, I don't think they are actually superior to the MM's. In one way, they are VERY inferior ( at least mine are..and I would bet yours are too) that is...they are far noisier than the new vinyl.

@daveyf 
I was typing while you made your comments. So you did make the 2x45rpm versus 33.3rpm comparison of the MM reissues. Results are again inconclusive as they changed their hardware to master the 33.3 version. I didn't know this, so my suggested 'controlled comparison' was based on an illusion. My bad.

Edgewear, I'm talking about RVG originals that were on the jukebox at the same time as the LP; that were specifically pressed as 45's for the jukebox.   

We are talking about the same identical "master tape"  pressed on a 45 with higher speed and more room; it had to be better.

Here are 45's that are available, but unless they were the 45's off of jukeboxes, and had not been handled by human hands, I wouldn't want them.

https://www.ebay.com/bhp/45-rpm-jukebox-records
        

@orpheus10 please stop your analogy with jukebox in each post, the OP is talking about "12inch format, not "7 inch.

What you’re talking about is just a "7 inch SINGLE invented by RCA long before the first "12 inch single appeared on the market.

Every radiostation played singles (one song per side) back then, also every club deejay played singles. This is professional format to promote hits, but please keep in mind that many small independent record labels never released any LPs (just 45s), some of them are private press. It was just a handy format to sell music. Special Promo Singles also pressed prior to LPs (if they were any) to promote new music.

In Jamaica they pressed only "7 inch singles (45s) for example.

Jukebox is just a player in public places for already well known music.

But to make a hit they need a radio dj and promo 45s (singles) to break the record before it became a hit. Same about local discoteques back in the days (in the 70’s).

Music released on "7 inch single is often different version, different take of what they released later on LPs.

Later when "12 inch 45rpm single was invented that was extended version of the song, often different take, sometimes absolutelty unique version available only on single and not available on LP. There was a maxi single format as well with many different versions of the same tune.

This is a whole different culture, compared to what a typical modern audiophile pressing company is doing now. What they do is just a regular LP (originally pressed on 33rpm), but re-issued on 2 x 45rpm "12inch LPs for better quality. Sometimes re-mastered in half speed. But it’s the same music as on the regular LP.

The culture behind the "7 inch 45s and "12 inch 45rpm singles (or maxi singles) is a whole different story. This is not about speed or size, it’s about different version, extended version, different take or remix. This is what makes those records unique, not just different speed or rotation on turntable.