I'm not going to argue the merits of one Burny RLG model over another because it often comes down to a matter of taste.
The high end models were all flametops but with thin veneers on top of solid maple plaintops.
I just want to point out that other than early to late 1980's RLG-90 models, and some RLG-70's that followed, other high end Burny flame tops will have solid flame maple caps of varying thicknesses and NOT veneer flame tops. (RLG-120, 150)
The RLG-240 is a solid flame top model, and does not have a figured top cap or veneer.
Burny plain top RLG base models are quite often not so plain, and always include FEB,
which is remarkable, in that other MIJ brand base models usually do not. (other than early Mint Collection Grecos).
You can expect to pay more than base model prices for figured plain tops however.
The cheapest base model RLG's are brilliant black and gold top Standards.
RLC's without ebony boards or premium pickups are comparable in price.
For 1 piece mahogany backs, you do usually have to go with higher end models.
photo #2 courtesy of Wulfman.