Difference between CAT5 and CAT6 – The Cat5e supports up to 1gbps data transmission, each of its twisted pairs can work at maximum transmit and receive up to 250mbps if they work in the Tx / Rx condition and their receivers support the same condition. The Cat5e usually works at the rate of 100mbps. One of its best characteristics is the malleability that this cable has, facilitating the installation, is a good cable in relation to cost x benefit due to its relatively low cost.
Differences between Cat5e and Cat6 twisted pair
The Cat6 works at the rate of 1gbps where two of its pairs work as receivers (Rx) and two other pairs work with transmitters (Tx), each twisted pair of the Cat6 has 500mbps rate capability, ie 500mbps x 2 for reception and 500mbps x 2 for streaming. The Cat6 requires simple electronics for each receiver at each end, it has an internal conduit (as you can see in the image on the side) which takes away its malleability, is a cable with a larger diameter thus making it difficult to install when many cables are used.
Gigabit Ethernet support:
As described above, both have gigabit support, but it is the CAT6 twisted pair whose main feature is the operation at this transmission and reception rate. For Gigabit-level operation the Cat5e requires complex cancellation of echo and NEXT for all four receivers at each end, ie to work properly in gigabit.