I don't think the neo 4 stars on 7 cells can match or beat the 4.5R on 6 cells.
I think 4 stars on 6 cells would equal around the 6.5R on 6 cells.
On 7 cells the 4 stars should be around equal to the 5.5R on 6 cells.
But I think the 4.5R has them all beat.
Anyone has actual hard evidence to compare all those motors?