Xiom Tau 55.5 is on my table. The rubber is made in China. Coming in a vacuum package, without sight of factory boost, there is glue layer on the sponge. 67g just for the ruber and glue, 164 x 164mm, 56 shore O. The sponge looks and feels similar to Vega China, the topsheet is a bit thinner, appears same to H3. The level of stickiness is very low, can't lift the ball, lower than the new Vega China and H3. Feels linear, without trampoline/ tensor effect. Speed and grip feels average, but need to spend some play time to confirm.
Update: I am starting to like Tau 55.5. Sponge a topsheet are elastic and difficult to break or separate. I played a bit on NSD and the rubber was very similar to boosted H3. Linear, low speed in short game, stable and powerful away from the table. Speed, control and block are better than H3, also is easy for looping. Even on BH it was easy. The throw is a bit higher than H3 but lower than Vega China. Only the spin is below H3 level. Definitely a better deal than Andro Chintac.