I would probably say 'Please read the following client testimonials'
for the second I think both are ok but I would use 'specially created'.
I hope that is helpful .....
Chambers Dictionary says, 'There is often confusion between specially and especially: specially means 'for a special purpose', as in • I made this cake specially for your birthday, whereas especially means 'particularly, above all', as in • I like making cakes, especially for birthdays. You will sometimes find especially used wrongly to mean specially:
To me the phrase 'testimonials of clients' suggests the testimonials are about the clients, so I would choose FROM
Especially created sounds like I made it for just you, so to be more general I would say SPECIALLY created.
THEWINNER, in your example, I would say 'these toys were created for Christmas with your child especially in mind.' as the child was being thought of above (all) others.
Specially/Especially:
In the sense of "particular" or "particularly," the words mean pretty much the same thing. Often they can be used synonymously. However, if you want to stress the exceptional or noteworthy quality, then especial or especially is a better choice. If you want to stress the distinctive purpose of something, then special or specially is the word you are looking for.
Language is continually evolving. As long as the meaning is understood virtually anything is allowed. I dont think the Rolling Stones would have the same impact if they sang 'I cant get any satisfaction'. The OED says especial and special mean the same and it is down to personal preference.