It is is a Core i3-7100u (2.4GHz) vs. The Core i5-4200u (1.6GHz / 2.6GHz), then I would just go for the Core i3-7100u.
Core I3 4th Generation Price In Sri Lanka
Shop for Intel 8th Generation Core i3 All Laptops at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up. Boxed Intel® Core™ i3-4130 Processor (3M Cache, 3.40 GHz) FC-LGA12C, for China.