Difference between Float32 and DType.float32

let dtp = DTypePointer[DType.float32]().alloc(10)
let p = Pointer[Float32].alloc(10)
for i in range(10):
    let fi = Float32(i)
    p[i] = fi

    # is a Dtype.float32 same as a Float32 in terms of memory layout?
    # what is the difference between DType.float32 and Float32?
    dtp[i] = fi

    # how do you create a DType.float32?
    # let fi2 = DType[DType.float32](i)
    # let dtp[i] = fi2