diff, diff -s, diff -sw , sdiff -s

[Ramírez Sánchez-Escobar José Julio]

It shows lines as different, but the output is identical(?).
I have tried with diff, diff -s, diff -sw , sdiff -s, cut -c35-37 , cut -c30- 
... with aparently identical files.
If needed I can send the whole files differed 
1152,1288d1151 2150a2014,2156 ?
< .54          > .54          ?
medusa1.cbm.uam.es 10% cat SEC_AA_NEW_9_4.pdb | cut -c35-37 > delme1 ; cat 
SEC_AA_NEW_9_4_CO.pdb | cut -c35-37 > delme2 ; diff -s delme1 delme2
1152,1288d1151
< .54
< .35
< .57
< .55
< .04
< .11
< .15
< .81
< .93
< .14
< .02
< .42
< .36
< .73
< .21
< .56
< .16
< .98
< .73
< .90
< .86
< .73
< .43
< .66
< .94
< .37
< .79
< .22
< .50
< .64
< .64
< .37
< .24
< .96
< .52
< .27
< .81
< .45
< .88
< .12
< .79
< .12
< .03
< .65
< .54
< .61
< .98
< .89
< .28
< .55
< .98
< .33
< .96
< .62
< .46
< .43
< .83
< .62
< .11
< .99
< .35
< .42
< .00
< .13
< .81
< .38
< .80
< .49
< .98
< .50
< .68
< .07
< .87
< .43
< .43
< .30
< .46
< .89
< .61
< .01
< .02
< .38
< .07
< .82
< .24
< .07
< .64
< .98
< .07
< .31
< .78
< .00
< .01
< .71
< .63
< .21
< .60
< .64
< .51
< .85
< .89
< .55
< .04
< .91
< .43
< .35
< .86
< .68
< .11
< .22
< .94
< .58
< .77
< .03
< .13
< .55
< .77
< .04
< .46
< .48
< .69
< .90
< .55
< .86
< .05
< .77
< .05
< .88
< .20
< .96
< .65
< .81
< .48
< .14
< .19
< .39
< .81
2150a2014,2156
> .54
> .35
> .57
> .55
> .04
> .11
> .15
> .81
> .93
> .14
> .02
> .42
> .09
> .51
> .11
> .05
> .01
> .30
> .67
> .42
> .70
> .28
> .11
> .50
> .99
> .38
> .86
> .73
> .43
> .66
> .94
> .37
> .79
> .22
> .50
> .64
> .64
> .37
> .24
> .96
> .52
> .27
> .81
> .45
> .88
> .12
> .79
> .12
> .03
> .65
> .54
> .61
> .98
> .89
> .28
> .55
> .98
> .33
> .96
> .62
> .46
> .43
> .83
> .62
> .11
> .99
> .35
> .42
> .00
> .13
> .81
> .38
> .80
> .49
> .98
> .50
> .68
> .07
> .87
> .43
> .43
> .30
> .46
> .89
> .61
> .01
> .02
> .38
> .07
> .82
> .24
> .07
> .64
> .98
> .07
> .31
> .78
> .00
> .01
> .71
> .63
> .21
> .60
> .64
> .51
> .85
> .89
> .55
> .04
> .91
> .43
> .35
> .86
> .68
> .11
> .22
> .94
> .58
> .77
> .03
> .13
> .55
> .77
> .04
> .46
> .48
> .69
> .90
> .55
> .86
> .05
> .77
> .05
> .88
> .20
> .96
> .65
> .81
> .48
> .14
> .19
> .39
> .81