Capacitors choice for MHz resonance circuit
These caps are very generic, especially with the C0G/NP0 dielectric.  (Note that C0G and NP0 are different labels for the same dielectric.)  The lower DF implies a lower ESR for the VJ1111 part.  Its geometry will give it a lower ESL as well; although that's not likely to be that much of an issue at 5-10MHz, I don't know what kind of harmonics you're dealing with.  It's got a better tolerance and is slightly smaller.  I'd go with the 1111 over the 1808 based only on this information, but you know your requirements best.