I should clarify, ongoing defects considered and compared, Delphi has no more stability problems on my AMD vs Intel laptop. I acknowledge that if the hardware gives me perceived stability, it is likely masking race conditions.
My Intel laptop is not likely be more than 10-15% slower in this workload, both are SSD as David points to. Laptops suffer from heat, as soon as the processor gets hot it starts to throttle down. The new desktop has plenty of cooling so it stays at full throttle. Your goal with an AMD build has to be keep it cool to maintain full core speed. So the speed gain is likely staying at full throttle, with a little extra clock speed.
If you are looking at a 5600 you should be running more than just Delphi to actually use those 6 cores and the cache you are buying.