TYPEMATCHSEO
Launch
Option A

Source Sans Pro

The quick brown fox jumps over the lazy dog.

Categorysans-serif
Vibeui-focused, legible
Weights2 Styles
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Option B
VS

Source Serif 4

The quick brown fox jumps over the lazy dog.

Categoryserif
Vibeadobe, text
Weights2 Styles
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The Verdict?

If you need ui-focused, choose Source Sans Pro. If you prefer adobe, go with Source Serif 4.

See Them Paired Together