I think the main question is about potential with McErlean vs Armstrong.
In his debut year Josh did enough to secure a second season in Rally1, but this year he hasn't shown much improvement compared to last year. I'm afraid he isn't going to become faster anymore and has reached his ceiling.
Jon on the other hand has shown good pace in some occasions and recent event with Rally2 was also a good comparison with other WRC2 top drivers.
In his debut year Josh did enough to secure a second season in Rally1, but this year he hasn't shown much improvement compared to last year. I'm afraid he isn't going to become faster anymore and has reached his ceiling.
Jon on the other hand has shown good pace in some occasions and recent event with Rally2 was also a good comparison with other WRC2 top drivers.