Dell Inspiron 15R (i7 model) or Lenovo Ideapad Y510 (i7 model)?

Well I need a new laptop. I'm confused between Dell Inspiron 15R and Lenovo Ideapad Y510.

Dell has:-
Intel i7 4500u (2 cores, 1.6GHz to 3.0GHz)
AMD 8850m (2GB GDDR5)

Lenovo has:-
Intel i7 4700mq (4 cores, 2.4GHz to 3.4GHz)
Nvidia Geforce GT750m (2GB GDDR5)

Both laptops have a 1TB Hard Disk, 8GB RAM and a tray load DVD writer. Both have a metal finish exterior, where Dell is completely metal while Lenovo has metal finished polycarbonate.

I will be using this laptop for watching movies, completing projects and some hardcore gaming which includes GTA 4, Far Cry 3, Battlefield 4, COD, Counter Strike, NFS etc.

I'm inclined towards Dell due to its look and good service support. But, I'm confused wheather the 2 core and less frequency model from Dell would be sufficient for gaming.

Please help me out. The maximum budget for me is 80000 INR.

If you know any other alternatives, tell me.

Since I'm from Delhi, India, brands like asus, msi, gateway, gigabyte are not available. Also I'm not a fan of e-commerce sites flipkart, snapdeal, ebay etc. So please suggest the laptop models which can be seen physically, before buying.

You say you are going to use your laptop for hardcore gaming. Which means you might be needing a service center quite often. So, considering the situation, i advice you, lenovo is the best choice here. Not only that, lenovo product you mentioned have a very good set of specs. And trust me Nvidia is always the better choice for graphic cards. Lenovo is the better choice between the two. No doubt in that.

You should go with Lenovo. Actually I'm using Lenovo from last 3 years, which is really nice. Actually you have another choice is Lenovo ideapad z570 model.

You can see the specification of this model is…
SPECIFICATIONS:
- Up to 2nd generation Intel® Core™ i5 processor with Intel® Turbo Boost Technology 2.0
- Up to Genuine Windows® 7 Home Premium
- Lenovo Enhanced Experience 2.0 for Windows® 7 with RapidBoot technology - delivers faster start-up & shutdown and optimized multimedia capabilities
- 15.6" Backlit LED HD display (1366x768), 16:9 widescreen
- Up to NVIDIA® GeForce® GT540M 2GB graphics with DirectX® 11
- Up to 8GB DDR3 memory, up to 750GB HDD storage
- Integrated Bluetooth®1, WiMax2 & high-speed 802.11n Wi-Fi
- Integrated DVD reader/writer & Blu-ray Disc™1 drive
- USB2.0, eSATA connectors & 5in1 card-reader
- Integrated 0.3/2M (720p HD1) webcam