Yes, the ball is a hair smaller.
CBJ asked about Mikolas before. I think he could potentially be a decent 5th starter at $3-4 million a year - I wouldn't put the ceiling much higher. It's also worth keeping two other names in mind - Wakui Hideaki, SP who won the Sawamura (Japanese Cy Young) in 2009 and is coming off a down year. True FA, 88-92 with a big mix of pitches, probably a lesser version of Maeda. Higher ceiling than Mikolas IMHO, but likely a #4-5. Also Hirano Yoshihisa, a closer who the Cards and Red Sox are supposedly interested in. True FA - 91-94 FB, very good forkball. Both those guys are in the 32-YO range.