Earlier there were 3 variants in laptops - consumer, prosumer and commercial in general. For Dell this has been Inspiron, Vostro and Latitude. For Lenovo it has been Ideapad, V series and Thinkpad. Each series has their own branching and some models will come in one of these classifications.
However with time, the first and second have been merged to a great extent to achieve synergies and hence poor quality.
For Lenovo V Series, the biggest issues we face is keyboard failure followed by hinges. Replacing them is not easy either. ideapad is equally same or worser. Ditto for Vostro/Inspiron.
But for the price its superb.