This paper presents the difference between the CNFET and CMOS technologies by using the design of an efficient 8×8 Vedic multiplier with Urdhva-Tiryagbhyam sutra. A carbon nanotube field-effect transistor (CNFET) uses either a single carbon nanotube or an array of carbon nanotubes as the channel material instead of bulk silicon in the traditional MOSFET structure. CNFETs show different characteristics compared to MOSFETs in their performances. The CNFET has many parameters such as operating voltage, number of tubes, pitch, nanotube diameter, dielectric constant, and contact materials which determine the digital circuit performance. This reduces the size of the chip but also cost and delay to a great extent. Here the comparison of CMOS technique with the proposed CNFET technique in terms of speed, power consumption, number of transistors, delay takes place.