To lease or to PCP

[Misterp]

Decided that I will be going for a 5 Door Dsg r in LSG.

I was thinking of chopping in my current GTD but turns out it's currently valued at 15200-15400 (dependent on dealer) and Currently has 16400 outstanding (balloon due in Sept of 15500) leaving me in -ve equity due to used car values plummeting. any deal I take will utilise some of my deposit or the contribution from VW towards the Negative equity.

On a PCP with Carwows healthy discount with PX and 3.5k deposit I am being quoted 407 PCP over 48 months.

I have been doing some digging and it turns out I can hand the keys back to Vw For my car as its over half way through and pay for excess mileage (approx £330).

If I do this the whole of my deposit and contribution can be used for new car as above with leather discover Nav rear view cam and car net. My monthlies on PCP works out at between 350-370pcm over 48 months. 

Other alternative is hand the car back and lease for 2 years 8k a year on a LSG 5door Dsg with sat nav and winter pack comes in at 270(ish) with 9 months up front or with maintenance at 296. Not the exact spec but pointless spreccing leather etc for an extra 50 Pcm

Question I have is simple which one would or have people in a similar position gone for. Pcp over the full four years will cost about 432pcm in the exact spec I want or the leased R for 371 over the term or 402 with maintenance per month for the term. Cost wise it makes sense even though the specs are different and leasing  gives me the flexibility as if my personal circumstances change (family is currently increasing in size 3 to 4 in December) I can reassess after 2 years.

Should mention, I was offered an r line 262bhp Touareg yday. I know completely different car and do I really need but something about having a car like that is making me think.
thanks

[wigit]

Given over supply and derv crisis I have opted to lease and would just keep an eye out for the VWFS deals as you can get through your dealer, downside is you essentially fund the option over the term

I am sure residuals with stabilise when reputation is restored, much as I love my blue R and estate at £200 a month as a daily was a no brainer so will cut my losses on mine