in addition to what Jesper wrote
do not forget the scale effect and that the tonal difference between 70 and 71 should be right. OTOH this scale lightening is also a matter of personal taste ... I like it better, especially for the darker colours
71 is a dark olive green (read it has a larger yellow part) while 70 is more blueish and even darker
But in the end your personal impression is what counts .. everyone sees colors different --- not to mention external influences like weather, lighting (sun set or noon), distance and other factors that can distort colors /color impressions ...
Choose what
Y O U like best --- or maybe your girfriend
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--- Of course base your decision on research, but in the end it is you who has to live with the result.
best wishes
Steffen