I would recommend running both https://thesimpledifference.com and https://knoxpayments.com through Qualys excellent SSL Server Test at https://www.ssllabs.com/ssltest/index.html when you got a spare moment over.

I would recommend configuring support for "Forward Secrecy" on both sites and enabling TLS 1.2 on thesimpledifference.com. Current score on both domains is "C".