Bbtuna,
Other Tables of the world are not CURRENTLY recognized for competition by the ITSF because, presently, the ITSF bylaws and codes allow for 5 Official Competition Tables and 5 Recognized tables. Each of those 2 sets of 5 slots are currently filled. Which tables are "recognized" gets voted on each year, Which tables are "Official Competition Tables" gets voted on every 2 years.
As far as the "slickness" of the tables.... that depends on how you define "slickness". In my opinion, Sardi (ITSF Recognized table) is probably the slickest. It plays much like the old Garlando tables. The ITSF Garlando has a different foot, and allows for pins and rollovers. But, I would say that of the 5 Official Tables, Garlando has the least ball control.
Tornado is not necessarily the slickest table, but it seems to be the table that non-Tornado players have the hardest time adjusting to. It is the least pin friendly of the Official tables. I also think the Tornado gives the smaller margin of error when trying to execute shots and passes. That is why top players have "simplified" their game on Tornado.
As far as ranking the tables based on controlability or grippiness, that is hard to do. The tables combine different characteristics to make them unique, and hard to quantify. For example, Bonzini is very grippy (even with the ITSF Bonzini ball), but many people still find control an issue on that table. Garlando is also grippy, but the surface is pretty slick, and the sdie strips are HUGE, the table plays extremely fast (I have the most trouble adjusting to this table). Everyone but Tornado players find control and grippiness an issue on Tornado, but Tornado players have little problem with control. The best overall tables for both control and grippiness (in my opinion) are the Tecball and the Fireball tables. This is mostly due to the ball (and the Tecball ball could be a little better). Tornado would be right there if they went with a slightly softer ball (somewhere between the current Tornado and Warrior balls).
That is enough for now,
Pat