How to match FFT results from Matlab and LTSpice

Hello!

I want to create a FFT in LTSpice and in Matlab for a sinus with an amplitude of 1 and an frequency of 1kHz and my goal is to get the same output from both programs. Here is the build in LTSpice with the voltage plot:

In LTSpice i set the maximum timestep to 100n and also added the options numdgt & plotwinsize to disable the compression. With that and the settings in LTSpice for "Number of data point samples in time: 16777216" and "Binominal Smoothing done before FFT and windowing -> Number of Points = 1" I get the following FFT plot:

In Matlab itself I used the following code to generate a sine wave with 1kHz.

%%Time specifications
Fs = 70000;                              % samples per second 
dt = 1/Fs;                              % seconds per sample
StopTime = 0.1;                        % seconds
zeit_matlab = (0:dt:StopTime-dt)';      % seconds

%%Sinus wave
Fc = 1000;                              %frequency
x = sin(2*pi*Fc*zeit_matlab);

% Plot the signal versus time:
figure;
plot(zeit_matlab,x);
figure;

To be honest I dont really have experience performing a FFT and for that I used the following code from (https://dadorran.wordpress.com/2014/02/20/plotting-frequency-spectrum-using-matlab/#9):

signal = x;
N = length(signal);
fs = 70000; %  samples per second
fnyquist = fs/2; %Nyquist frequency

X_mags = abs(fft(signal));
bin_vals = [0 : N-1];
fax_Hz = bin_vals*fs/N;
N_2 = ceil(N/2);
plot(fax_Hz(1:N_2), 10*log10(X_mags(1:N_2)))
xlabel('Frequency (Hz)')
ylabel('Magnitude (dB)');
title('Single-sided Magnitude spectrum (Hertz)');
axis tight

The plot which I get from Matlab is the following with the peak at 1kHz:

And now my question is how can I match them, because when we look at the y-axis the have there different values. I hope this makes sense to someone =)

Best Regards!