Trust me, when you're under that amount of pressure and you know you have to say something, it will just come naturally to you! I first I thought omg how do I answer this, but then it clicked on me!
It can be done, writing a personal statement tailoring it to both. And yes people get offers for completely different courses with the same personal statement but teaching is different. Teaching courses are one of few courses which leads to an exact profession, so the passion and enthusiasm in your personal statement is what the unis will most probably look for because they want to know that you are definately sure that teaching is for you.
At all of my interviews, when early years and general primary have been mixed together the focus has been on 'Why specifically early years' or 'why specifically general primary'. And the answer that they want to hear for early years if different to that of general primary because an early years teacher has different responsibilites and a different job description in a sense to a year 6 teacher. I would recommend applying for either one or the other, just to give you the best chance because it's really not uncommon for admissions tutors to reject people because their personal statement does not focus on a particular age range. However unis can look at different things, some will interview just based on personal statements while some will look mostly at the academic side of your application.
If there's not some huge reason why you have to stay close to home, maybe you could look at unis further afield? I live in Warrington (a town inbetween Manchester and Liverpool), I applied to Edge Hill (45 minutes away), UWE (3 1/2 hours away), Manchester Met (45 minutes away), Chester (1 hour away) and YSJ (2 hours away). At first I was just going to apply to North West unis but then I looked further afield, and really liked UWE when I went for my interview and then decided to make it my insurance choice. The location is totally your decision though, some people are just comfortable with staying close to home and others have to for many reasons.
Ultimately, it is your decision. I would recommend applying to one course or the other. You may get away with getting offers on both courses (I somehow did and some people in this thread have), but it's up to you if you want to risk it, teaching is relatively hard to get into. For you best chance of success I would recommend having a very strong PS directed at either early years OR general primary. It can be done (applying to both) but make sure you personal statement stays focused!
xxx