I am torn between the Goldtop R4 (P-90) and the Plaintop R8 (Hbucks). Never played P-90's before. Have a 61 RI SG with 57 Classics (Hbucks). For those that know these two guitars well, how do you think they differ, and what do you like or dislike about them in every aspect (tonally,ergonomics and aesthetically)? Thankyou.