Ok, you're talking 2 different things here...……….
Each will typically work well...……… let me provide a little further explanation.....
In summary, it's really nothing more than terminology here, sealants in general, use chemical agents or hardeners that when added to "wax" type products", makes them "harder" and typically more resistant to environmental impact....such as heat, IR/UV light, etc., making them more durable and to a certain degree, protects the paint a bit better, but that should not be interpreted that a good quality conventional wax would not provide excellent results as well.
Megs, etc. are not badproducts, they have a great marketing program, but IMHO, they just don't hold up or work as well as commercial/professionalgrade products (that actual cost the same or less typically). You have to remember,the "Laws of chemistry" have not changed in the past 50 years and they likely won't change in the next 50 years either...…...everyone uses the same substances to formulate their products, what isdifferent is the purity/concentration & price.....typical retail names aremuch more expensive per ounce than commercial lines.
May I recommend...……….
If you have specific swirl markissues I use BAF/Pro Car Care Beauty Products P21 Swirl Eliminator &Polish- although for 30 years I used 3M products specifically, I have not beenas pleased with the quality of 3M’s hand glaze for the past few years. I typically do not like"combination" type products but P21 is very, very impressive &effective from end result, ease of use & overall effectiveness.
As far as sealants go, the absolute best ($ for $) IMHOis "Satin Cream" (for dark colors), it is made by BAF &distributed through Pro Car Care products. It is very easy to work with eitherby hand, orbital or buffer. It has the same acrylic hardener as the high dollarpaint sealants but it has 30% German imported carnauba....no, your arm will notfall off putting it on or taking it off & it has a very mild polish in itas well. Even parking the vehicle outside, the MFG gives a 6 months warrantybefore another application is required. I use this personally on my toys &daily drivers (which include a 1997 black Cougar sport) and all I can tell youare not even bugs like to stick to the paint- most of the time when water isapplied they just float off- bird poop is just as easy. No smeary look either-very clean clear deep look. On my toys, I give them a fresh coat about every 2years (literally, even for a show), my daily drivers (I have one that sitsoutside), I apply to the entire vehicle every 6 months, and do the hood, roofand trunk every 3 months (probably overkill, but I know it is well protectedfrom the elements including industrial fallout).
For light colored cars I use Profection PaintSealant (P-73-Q)…it is the same product as “Satin Crème” but without thecarnauba….it brings up a much higher shine which on light colored cars looksbetter IMHO (although it has less depth of shine that carnauba gives) and ithas a much higher level of polish in it.….I also use this on all my chrome,stainless, etc…it not only shines it up like new but it is sealed from theelements as well……it works very nice on the poly carbonate headlamp lenses aswell- cleaning up the lighter haze that happens over time.
BAF Industries 1910 S. Yale Street Santa Ana, CA 92704 800-437-9893...they also have a online order system as well, but it's best to purchase from a local distributor.
An excellent alternate product is 3M Perfect It Show Car Liquid Wax- a siliconewax/polish but excellent results as well, just maybe about 90% of the qualityof the satin cream...….of which I previously used this on all my personal vehicles (including my toys) for 20+ years! Very affordable and available online, auto body paint stores and amazon.
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Certified backyard mechanic I & II