Howson made the switch in January, while Snodgrass was snapped up last week.
"He's definitely got something to add, has Snods," Howson told the Pink 'Un. "I played with him for a good few years up at Leeds and he's definitely going to come here and add good competition for the lads we've already got here. He's done a terrific job at Leeds with assists and goals.
"He's a danger to teams and I'm sure he'll bring that to our side as well. He's one of those wingers who causes problems for the full-back, likes to get at defenders. It's only going to add competition.
"I think every young professional's aim or dream is to play at the highest level and I think at the minute this is the highest level, the Premier League. It's the best league in the world.
"When there is a chance you can make that step up, you maybe can't pick and choose these decisions. You sometimes have to take it when the chance comes. Everyone wants to play at the highest level against the best teams and best players in the world."