Question 1

Which is better, Sony TOUGH CFexpress Type B 640GB or ProGrade Digital CFexpress Type B Cobalt 650GB?

Accepted Answer

Based on our testing, the Sony TOUGH CFexpress Type B 640GB scores higher overall at 9.2/10. The Sony TOUGH CFexpress Type B 640GB scored 9.2/10 and the ProGrade Digital CFexpress Type B Cobalt 650GB scored 9/10 in our Best CFexpress Cards Type B 2026 evaluation.

Question 2

Is the Sony TOUGH CFexpress Type B 640GB worth it over the ProGrade Digital CFexpress Type B Cobalt 650GB?

Accepted Answer

The Sony TOUGH CFexpress Type B 640GB scores 9.2/10 while the ProGrade Digital CFexpress Type B Cobalt 650GB scores 9/10. The Sony TOUGH CFexpress Type B 640GB is our "Best Overall" pick in the Best CFexpress Cards Type B 2026 category.

Sony TOUGH CFexpress Type B 640GB vs ProGrade Digital CFexpress Type B Cobalt 650GB: Which to Buy?