Mike Napoli is not Josh Hamilton. Not even close. For starters, Napoli is helping his new club. With Napoli adding a large dose of power to the middle of the lineup, Boston brings a high-scoring offense and the best record in the majors into Friday’s series opener against the Rangers at the Ballpark. This will be the first measuring-stick series of the season for the Rangers. None of the seven teams the Rangers have played this season has a winning record. “It’s going to be fun,” Napoli said via e-mail this week. “I can’t wait to go see those guys and play against them and try to beat them. I still want to do good and show them I can play.” The reception for Napoli should be a love-fest compared to what Hamilton received during the first weekend of April. On his way out of town, Hamilton made himself a target by making snide remarks about the Rangers’ fan base. Napoli takes the opposite view. He will always cherish spending the previous two seasons with the Rangers. “I had probably the two best years of my career in Texas,” Napoli said. “I enjoyed every minute there. From the guys on the team, the coaching staff, the fans, it was great.