Sewing the light ripstop inner tent fabric is DIFFERENT from sewing silnylon or PU-coated fabric! So you WILL need to modify the seam.
To explain: both silnylon and PU-coated fabrics (and cheaper acrylic-coated fabrics too) rely on the coating to stop the fabric from fraying. With uncoated fabric you do not get this safety margin, and massive fraying at the seam is possible. Imho it is essential to fold the seam over and at least double-stitch it. A 'felled seam' is suitable for this, but variants are also OK.
Yes, I have relied on a single seam with uncoated fabric, and yes the fabric did fray and pull out of the seam. So remember: a fold at the seam and an extra line of thread weighs nothing compared to the problems from a 'blown' seam in the field!