Based on the only 45RPM title I own (Fleetwood Mac-Rumours), I can't say that it's worth the extra dollars to invest. Now, it could very well be that some other 45RPM releases are true stunners, but personally I'm hesitant to jump into that market. I guess I just expected more.
this is a relatively poor example of 33 verses 45. it's ok and better than average pressing of the 33. nothing wrong but just a bit lacking sparkle and life. but there are so many marginal pressings of Rumours that the 45 is still not bad. i have 2 copies of the 45. and there are even 2 different pressings of the 45.
and my original pressing 33rpm is much much better than the 45. it did take me a few years to find my 33 though and 10 different pressings of Rumours.
i also have a 15ips, 1/4" master dub of this recording.
do a search; there are dozens of threads on various forums regarding this 45rpm pressing if you want to read about it.
i own almost 100% of all 45rpm reissues....almost 1500 of them. they are easily the best sounding ways to hear this music. and compared to original pressings, they are mostly at least as good sounding and better in many cases, cheaper, and much much easier to find.
they are the most prized part of my music collection.