help with comparison, please!

[confusedtoo]

i think i''m about to go blind comparing all these diamonds! who knew mere tenths could sway things one way or another.

to that end, how reliable do you all find the hca to be? what, visually, is the diff bet excellent and very good?

if you don''t mind - any opinions on which is the best deal of the three? all are ags cert. these come from 3 diff vendors.

1 ct f/si1 (inclusions look to be across table but am told eyeclean)
6.48 - 6.51 x 3.96
depth: 61.1 table: 55
crown: 34.7/15.6%
pavilion: 40.8/43%
girdle: thin-med faceted
fluoresence: negligible
hca: ex-ex-ex-vg 1.3
PRICE: $6,410.00
1.035 f/si1 (plot looks amazingly clean for an si1)
6.54 - 6.60 x 3.96
depth: 60.3 table: 57
crown: 33.8/14.5%
pavilion: 40.8/43%
girdle: thin-med faceted
fluoresence: negligible
hca: ex-ex-ex-ex .9
PRICE: $6,145.00
1.05 f/si1 (am told eyeclean, inclusions off table)
6.55 - 6.59 X 3.98
depth: 60.6 table: 57
crown: 14.6%
pavilion: 42.3%
girdle: med - slightly thick faceted
fluorescence: negligible
hca: ex-ex-ex-vg 1.1
PRICE: $6,134.00

if you can help - i''d really appreciate it. THANK YOU!! https://www.pricescope.com/idealbb/images/smilies/3.gif