"We had a good run with him helping us win games then he came back and got another injury and Shaun has progressed since. Sure, he's a different player to Shaun, but he's right in the frame."
Johnson has backed up his words to the Herald on Sunday in early June after earning his first cap. He has not been intimidated by more senior players and has never been paralysed by worshipping those around him.
"The boys look at me to tell them what to do," he said. "You can't be daunted; you've got to do your job. If the boys are looking, wondering 'what is Shaun up to?', you've got to step up."
Hooker Aaron Heremaia has worked closely with both players and will play with Seymour in the UK next year.
"Buster's a calming influence when things are tight; that's where his strength lies but Shaun has got the X-factor. An important plus for Shaun is that James has stepped up with more of a voice in the halves - which is Buster's area of expertise."
Maloney is also reluctant to choose between team-mates but his improved directional skills mean he can assume more of Seymour's responsibilities thus freeing up Johnson's flair and pace.
"It's a tough one. Buster has played well but suffered a horror run of injuries. There's a lot more on my shoulders at the moment as the senior playmaker. I'm happy to do it; if you want to be any good at this level you've got to stand up and make your mark. "I don't find it too pressuring, the boys expect a job from me. Shaun and I often talk about the style we want to play so we're trying to balance that. The more time we spend together the better."
Both are seen as long term signings. Maloney is expected to be offered big money to extend his contract beyond next year.