| 11. | And like their stores, their Web sites are somewhat hard to tell apart.
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| 12. | Luxury brands were getting harder to tell apart from one another.
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| 13. | The Bure brothers are harder to tell apart on the ice.
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| 14. | The two species can be very difficult to tell apart.
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| 15. | Both young men were excellent students, though they could be difficult to tell apart.
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| 16. | Females of the respective species are harder to tell apart.
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| 17. | The oversaturation of so many new artists made the acts harder to tell apart.
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| 18. | "Phycita " species can be hard to tell apart from related moths in the field.
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| 19. | Even then species are quite hard to tell apart.
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| 20. | "Cryptoblabes " species can be hard to tell apart from related moths in the field.
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