First of all I do not have to compare mattress materials (wood, plastic, metal). Me I think the plastic mattress offers great playing comfort, the ability to make quick phrasing and perfect sealing of providing precision tongue-blocking or puck. So far I try to stay very eclectic and I buy all kinds of harps.
SPECIAL Returning to 20, there are other harmonicas feature plastic mattress, so why SPECIAL 20?
- Take a Lee Oskar, which costs the same, precise game, accuracy, strength, finishing, Lee Oskar is higher, but ... It is very difficult to draw SPECIAL Overblow while 20 is just a good play for Harmo overblows. Advantage Special 20!
- Take a Golden Melody, superior in all respects SPECIAL 20 (including overblows) ... But it is impossible to put on a harmonica holder because of its rounded hood. Advantage Special 20!
- Now you can still ruin with a Cross or a Suzuki harp not widespread, but when you have broken along the way, what is the harmonica that you will find at the Milonga Zac corner ... A SPECIAL 20!
For all these reasons, and perhaps also to maintain a natural play on an imperfect instrument rather than to nab the bad automation on a super roll-lip, always have a Special 20 in your GEAR!