The second Folio has the same except that it substitutes 'Flowing' for 'Flawing.' The third and fourth have substantially the same reading as the second.
Rowe edited it thus:
'Hear while I speak it, Love:
The Grecian Youths are full of subtle Qualities,
They're loving, well compos'd, with gift of Nature,
Flowing and swelling o'er with Arts and Exercise;'
Pope followed Rowe, with a difference of punctuation:
' ... with gift of Nature
Flowing,' &c.
Theobald followed Pope, except that he restored 'why' for 'while' in the first line, and Warburton Theobald, reading 'gifts' for 'gift.'
Johnson followed Warburton, except that in place of 'qualities' he restored 'quality.'
Hanmer has:
'Hear why I speak it, love: the Grecian youths
Are full of subtle qualities, they're loving,
They're well compos'd, with gifts of nature flowing,
And swelling o'er with arts and exercise.'