Looking to buy

Which one should I buy between them I want a laptop for browsing and office work . I just joined a firm as a intern in finance and data analyst so office work on these softwares ms office , ms excel, sql , python , tally prime , power bi etc. . Sorry should I buy lenovo thinpad or dell model . Both laptop are refurbished . Dell k3480 -16k L/470 8 /256- 15k Or you can also suggest any other laptop with model my budget is around 20k